Backrest, lumbar support, chair, attachment structure for optional member, optional member, and furniture

a technology for lumbar support and attachment structure, which is applied in the field of backrests, lumbar supports, chairs, and attachment structures for optional members. it can solve problems such as impairment of appearance, and achieve the effects of satisfying attachment, robustly maintaining attachment state, and improving workability

Active Publication Date: 2021-04-06
OKAMURA CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

Improves workability and maintains a robust attachment state between the optional member and the backrest, preventing separation due to load-induced moments, even when there are shape discrepancies between the attachment portion and the optional member.

Problems solved by technology

In such a chair, if the lumbar support is set as an optional member to be selectively attached to the chair, even when the lumbar support is not attached to the chair, the lumbar support holding portion integrally formed with the back frame remains and hence an appearance is impaired.

Method used

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  • Backrest, lumbar support, chair, attachment structure for optional member, optional member, and furniture
  • Backrest, lumbar support, chair, attachment structure for optional member, optional member, and furniture
  • Backrest, lumbar support, chair, attachment structure for optional member, optional member, and furniture

Examples

Experimental program
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Effect test

first embodiment

[0112]Hereinafter, a chair according to a first embodiment of the present invention will be described with reference to the drawings.

[0113]FIG. 1 is a perspective view showing the chair according to the first embodiment of the present invention as viewed from a side. FIG. 2 is a perspective view showing the chair according to the first embodiment of the present invention as viewed from a rear side (backrest side).

[0114]As shown in FIGS. 1 and 2, a chair 100 includes a leg 1 which is installed on a floor F, a box-shaped support base 2 (not shown) which is installed at the upper portion of the leg 1, a seat receiving member 3 that is attached to the upper portion of the support base 2, a seat body 4 which is slidably supported on the seat receiving member 3 and on which a seated person sits, and a backrest 7 which extends from the support base 2 and supports the seated person sitting on the seat body 4.

[0115]In the following description, for convenience of description, a direction in ...

second embodiment

[0168]Hereinafter, a second embodiment of the present invention will be described with reference to the drawings.

[0169]As shown in FIG. 8, a chair (furniture) 1010 according to the second embodiment of the present invention includes a leg 1001 which is installed on a floor F, a box-shaped support base 1002 which is installed in the upper portion of the leg 1001, a seat receiving member 1003 that is attached to the upper portion of the support base 1002, a seat body 1004 which is slidably supported by the seat receiving member 1003 and on which a seated person (not shown) can sit, a backrest 1007 which extends from the support base 1002 and is able to support the back of the seated person sitting on the seat body 1004, and a lumber support (optional member) 1100 which is provided in the backrest 1007 to be attachable and detachable.

[0170]In the specification and the drawings, a side in which the seated person sitting on the seat body 1004 faces forward will be referred to as a “front...

third embodiment

[0249]Hereinafter, a backrest according to a third embodiment of the present invention will be described with reference to FIGS. 23 to 37.

[0250]A chair 2011 shown in FIG. 23 includes a leg 2013 which is installed on a floor 2012, a box-shaped support base 2014 which is installed on the upper portion of the leg 2013, a seat receiving member 2015 that is attached to the upper portion of the support base 2014, a seat body 2016 which is slidably supported by the seat receiving member 2015 and on which a seated person can sit, and a backrest 2001 which extends from the support base 2014 and is able to support the back of the seated person sitting on the seat body 2016. The backrest 2001 of the chair 2011 serves as a backrest according to the embodiment.

[0251]A side in which the seated person sitting on the seat body 2016 faces forward will be referred to as a “front side”, the opposite side thereof will be referred to as a “rear side”, and a direction connecting the front side and the re...

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Abstract

A backrest (7) includes: a tensile material (71) on which a load support surface (71f) configured to receive a load of a seated person is formed; a back front frame (80F) that supports an outer peripheral end portion (71e) of the tensile material (71); an attachment portion (87) which is formed in the back front frame (80F) and faces the tensile material (71) in a state where the attachment portion (87) is separated from the tensile material (71) in a direction intersecting the load support surface (71f); and a lumber support (200) that is attachable to and detachable from the attachment portion (87), in which the lumber support (200) includes an attaching portion (222) which extends in a direction along the load support surface (71f), is inserted into a gap (S) between the tensile material (71) and the attachment portion (87), and is fixed to the attachment portion (87).

Description

TECHNICAL FIELD[0001]The present invention relates to a backrest, a lumbar support, a chair, an attachment structure for an optional member, an optional member, and furniture.[0002]Priority is claimed on Japanese Patent Application No. 2016-116113 filed Jun. 10, 2016, Japanese Patent Application No. 2017-074011 filed Apr. 3, 2017, and Japanese Patent Application No. 2017-074012 filed Apr. 3, 2017, the contents of which are incorporated herein by reference.BACKGROUND ART[0003]As described in Patent Document 1, a chair in which a backrest is provided in front of a backrest support frame rising from a rear portion of a seat surface and the backrest includes a net-shaped tensile material, a back frame holding an outer peripheral portion of the tensile material, and a lumbar support provided behind the tensile material is known. In this configuration, the lumbar support is attached to a lumbar support holding portion which extends upward from a lower portion of the back frame and is inte...

Claims

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Application Information

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Patent Type & AuthorityPatents(United States)
IPC IPC(8): A47C7/40A47C7/46A47C7/02
CPCA47C7/462A47C7/02A47C7/40A47C7/46
InventorMASUNAGA, HIROSHITOTSUKA, SHINPEI
OwnerOKAMURA CORP